Henry e



I H. OANPIELD...

DOUBLE ACTING SPRING HINGE.

Patented Ma 1 5, 1855.

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1T0 all whom it mayconcem: 1

. *Beit known that I, HENRY E. CANFIELD, of the city of New York, county of New jYoltk, and State of New York, have invent-- 56 91 a new and Improved Method of Conand Idohereby declare that the following 1 1 is afull and exactxdescription thereof, ref- A erence being had'tojthe accompanying draw- 1 1o ings and the letters and figures. ofreference markedithereon; f 1

The nature of lmyl finvention consistsin Gthe arrangement of two springs o-none' pin in the manner andlfor the purpose hereinis after described. f j

AvTo enableo-thers skilled in the artto make anduse myinventionl will proceed to de- Y scribe its constructionand operation. I 1 In the accompanying drawings Figurel is a top viewQFig. 2 isan enlarged top iew, showing thepositionof the catch (H) 1 andjthe holder when the upper cylinder sheldmfastfiand the lower .cylinder withits deaf and the ismoved from the position shown in the? dotted lines. Fig. .is a sectional sideviewvof the hinge show ing the arrangementfo-f the different parts. Fig. 4 is aperspect ive view of thepin (E) viththelsprings (F F)]and the holder (K) howing \thegimanner 1 in which the said older prevents the further uncoiling of the 'd springs! I Like letters in te different figuresrefer to likejparts. I 1 y .In'Fig. 1. A .iArepresents a cylinderof ollow chamberofmore than half the depth ing the. upperpart o fig the pintE) and two structing Double-Acting Spring- Hinges;

spring hinges. therefore 3 cast ironor other-l material, having alarge 1 ff said cylindenfthe said chamber contain- 1 40ffiatfcoiledsprings, coiledin opposite directionsandattached tothe-pin,(E) at I,the

. manner andvposition.ofsaid springs with theholder K is shown in which j. TATESPATENT OFFICE. 1

DOUBLE-ACTING SPRING-HINGE.

Specification .51 Letters Patent No. 12,853, dated May 15, 1855.

F Frepresent the springs, E the pin and K the holder. .A, A,Fig. 3, aretwo catches H H. In: the

On the inside of the cylinder same figure D represents a leaf attached'to the lower cylinder C C for the purpose of securing the same to the door frame, represented by the dotted lines M M in the Fig. 1, the dotted lines in the same figure representedat L L show the position of the door with; the projecting leaf B (which forms part of cylinder A A) let into the edge of the said door, and secured thereto.

. Operation: The lower cylinder to which the pin E is secured and prevented from turning by the small pin G (Fig. 3), being made fast in the door frame as previously shown, the upper cylinder and with it the door would be free to turn on the pin E were it'not for the catches H H, now by turning the said door in either direction it will bring one or the other of the catches (H H) in contact with one or the other of the hooked ends of the springs (shown in Fig. tby F F) which spring will cause the door when left free to return until the cured in hollow cylindrical chambers have been before used in making double acting ,I disclaim their invention. But

1 What I do claim and desire to secure by Letters Patent, is, r

in combination with the holder K or its 1 equivalent.

1 *HENRY E. GANFIELD.

lVitnesses I GEO. (l. THOMAS, 1H0, R. QU NBY.

The attachment to one pin, of two flatcoiled springs coiled in opposite directions 

